Mounting and maintenance
4.5 Replacing individual components
Power supply system SITOP PSU8600
126 Manual, 09.2018, A5E36758446-5-76
Replacing individual components
A replacement involves replacing an individual component by a component of the same type
with the same order number (e.g. as replacement for a defective component).
It is only permissible to replace individual components when they are in the no-voltage state.
Before starting removal work of any kind, the main switch of the system must be opened
and measures taken to prevent it from being reclosed. If this instruction is not observed,
touching live parts can result in death or serious injury.
Risk of damage by breaking off the plug connector
The components can only be safely and reliably removed when the plug connectors have
been released. Release the plug connectors, before removing or replacing the basic unit
and supplementary modules.
Risk of damage as result of jamming when withdrawing
Withdrawing individual components without taking the appropriate care can damage
adjacent components. Withdraw components carefully, without applying excessive force.
Replacing an expansion module â‘¡ is shown as example. The procedure is similar for all
components.
Removing installed components
1. Switch the basic unit into a no-voltage condition.
Note
For a hardware configuration with one or several buffer components, after bringing the
basic unit
into a no-
voltage condition, the first step is to discharge the energy saved in the
buffer components. This can take several minutes under no load conditions (all of the
outputs are switched off).
For buffer modules with double layer capacitors, and for the UPS module, you can exit
buffering by opening the "ON" contact.
2. Wait until all of the LEDs of the system have gone dark.
3. Release the connections at the plug-in terminals of the component to be replaced.
If the basic unit is replaced: When necessary, also release the Ethernet/PROFINET
connection.
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